Angle-bar bending die



Oct. 1l, A HQSSFELD ANGLE BAR- BENDING DIE Filed March 50, 1931 dei toprovide-a Vdevice for bending kan angle bar Referring to the drawing, a device is shown Patented Oct. 11, 1932 *A Unirse stares arent easier;

inner nossnnnn, or Winona, Miivimsoiii ANGLE-Ban esivnine nin Appi-ieation mea Marea so, 1931. serial NQ. 526,251.

rhis invent-ion relates to a bending ma the other iiaiige of the bar, one of the dies chine', and While the invention might have vahaving a movable portion engaging the other rions applications, it particularlyl Was deside of said latter ange with a flat surface, signed as a bei'idinv machine oj the die type, Wedge or cain means being provided for mov- V554 for bending angle bars. It has been quite diiing said portion oi' said die as the dies are :Zw

heult to bend yangle bars in a machine oi this brought to position engaging said bar. type, as an angle bar tends to become very lt is more speciiically an object of the inn'iuch' distorted in a bending operation. Apvention to provide al hand Operated machine 'Y plicant has previously perfected a machine for bending an angle bar with one lange per inw for bending angle bars on the curve With the pendiculai-to the axis of bend, and bent on ya flange of the angle bar perpendicular to the conve'i: curve, comprising relatively movable axis-f the curve or bend being concave. The dies having mating convex and concave surpresent machine is designed to bend an angle faces, one of said dies being pivoted for bair ivi-th lthe flangeyvvhich is `substantially swinging movement toward the other and perpendicular :to the. axis of bend being on the other die being` stationary, a lever sWin-g- 65 the convex side of thecurve. It is believed able about a ixed axis and lia-ving means that this has, notY heretofore been accomengaging the movable die to swing the same plislied on a -die typeof machine. toward the stationary die. y Y

u it is an object of this invention, therefore, rilliese and other objects and advantages of 2g' tdprovide a simple and eilicient device for the invention will be fully cet torth in the 70 bending @Dangle bar wtlyone flange O-E the 'following description made in connection bar' which .is .substantially perpendicular to With the accompanying drawing, in which thiewaxis oi? the bend or curve being on a conlike reference characters refer to similar Vex curve. v Y. y parts throughout the several views and `in vitt is a'. further object 0f the'invention tol Wliichz providef'a.' device or bending an angle bar Fig. l is a` plan view of the device, some as setiorth in thev preceding paragraph coniparts being broken away;

prisiirg relatively movable dies :tor engag- Fig. 2 is a horizontal section takenon line ing-one' ange oi the bar', which Harige is par- 2-2 of l* ig'. 3; y

, c v n fi 80 so allel to the a-Xis of the bend, and having nig. 3 is a view in sine elevation,

means With flaty surfaces for Aengaging the Fig. at is a vertical section taken on line other flange of `the bar so that the b'ar is ben-t' eine or Fig. 2, and

Without-being distorted. Eig; 5 Vis a vertical section taken Online 4lit is still another object oit the 4invention 5-5 of Fig. EZ.

` with one flange perpendicular to the axis of which comprises brackets l0 and l1 which bend, and bent on a convex curve comprismay be secured to any suitable support such ing relatively movable dies -for engaging and a bench or table top l2. Brackets are Y gripping said` fla-nge and having other surshown secured to member 1:2 by the headed l ibi tacestvhieh engage the'iia-n'ge which is paraland netted bolts 13. Brackets l0' have -selelftofthefairis of bend, meansbeing provided cured thereto by the headed and nutted bolts for relatively moving the' parts engaging the Mia 'ranie 15 comprising spaced bars 15a mentioned vflange-fas the bar is engaged and o having portions adjacent bracket l0 l bent. y which are parallel and quite close together, 4t; .1t S-gtll afm-other object ofitheinvention t@y and which are spaced by the spacing bushp'rovide :a device for bending an angle barv ings 3.6. One of these bushi' gs surrounds with :one :iiange substantially perpendicular one bolt lll and the other' surrounds headed. tothe anis' of bend, `and bent on a convex and nutted bolt 11i@ passing through bars r curve',comprisinigapairof dies, atlat surface 15a and 15?). Bars 15a and l5?) diverge bef` adjac'ei'i-t said dies engaged by one side of tween brackets 10 and 1l and have outer parallel portions spaced quite a greater distance apart, the sanne being spaced by a spacing member or bushing 17. The bars a and 156 are apertured to receive a headed and nutted bolt 18 forming a pivot for a swinging member 19 having a hub portion disposed between the bars 15a and 156. Meinber 19 is formed adjacent one end with an inclined surface 19a. Member 19 is of angular shape in transverse section as shownin Figs. 4c and 5 and has a horizontally projecting portion provided with a flat top surface 196. This horizontal portion and'flat surfaceextend over quite a large extent as shown `in Figs. 1 and 2, having a curved portion at one end as shown at the bottom of Fig. 1, and said portion also has formed 'therein a semi-cylindrical slot 19d. Member f 19 has its vertically extending portion provided with spaced projecting ribs 19e and as shown in Figs.- l and 5, these have their front or' bottom surfaces 19e inclining down- Y wardly at an angle of substantially 1150 towardsaid vertical portion. Member 19 constitutes a die member and the same has another member or portion 2O having a front surfacerwith a curved portion 20a and a straight portion 206 which extends substantially tangentiallygto said curved portion.

`Member 20 is'provided with spaced slots receiving portions 19e and said slots are provided with surfaces 20c inclined at the same angle as the surface of ribs 190. Member 2Ok is substantially of rectangular shape in vertical cross section, except at the slots which receive ribs 190 where the section is as shown in Fig. 4. Another die member 21 is prot vided, having al surface, a portion of which 21er,` is'c'urved and opposed to thesurface 20a and another portion 216 of which is lat and tangential to portion 21a and opposed to the flat portion 206 of die memb-er 20. Die member 21 extends between the bars 15a and 156 and is pivoted therebetween and between a vpair of bars 22 and 28, which bars are disposed respectively at-the inner sides of bars 15a and 156 at their outer ends. rlhe lower surface ofk member 21 is flat and extends over and substantially in Contact with the surface 196. Apivet member comprising the headed and nutted bolt 24 extends through bars 15a and '156, bars 22 and 23, and the Vdie member 21. Said bolt also extends through a washer i or collar 25 disposed beneath member 21 and between the same and bar 23. Bars 22 and 23 have another headed and nutted bolt 26 extending therethrough and therebetween on i which is journaled betweensaid bars a roller 27. Bars 22 and 23 are secured at their other., ends to av lever member 28 which has a handle i portion 29 extending therefrom. Members 28 and 29 can be made as long as desired, and in practice, thesearel of considerable length,

Y so that a strong leverage can be obtained.

In' operation, when the angle bar 30 is'to one flange engaging surface 196 as shown in Figs. 1, 4 and 5. Lever 29 isl now swung in a clockwise direction as seen in Fig. 1, and roller 2? engaging the surface 19a swings members 19 and 20 toward vthe member 21 so that the vertically extending flange of the bar is as shown in Fig. 1 engaged between the members 2() and 21, said flange engaging the end portions of member 2O at one side and beinO'v engaged at itsV other side by the surface 216. The operator now continues to swing lever 29 and roller 2'? moves member 19 further, so that pressure is exerted on member 20. rlhi's pressure causes the surfaces 20c to engage the surfaces 19e and member 2O is cammed or wedged downwardly so that its lower flat surface engages the top of liange a of angle bar 30, said flange now being gripped between the bottoms of member 30 and the surface 196. Continued movement of lever 29 brings the curved surfaces of members 2O and '21 closer together, and the flange 30a is stretchedas it is bent and the angle bar tends to collapse te a smaller angleV than a right angle.,` The vertical v` flange SOZi-Vwarps over and continued movement of members-2O and 21 brings this flange snugly between the surfaces 20a and 21a as well as 206 and 216,. andthe ilangelis again straightened up so that the angle `bar has been ybent and is still a perfect right angle. When 'the vertical ange 306 is tightly gripped between the members 2O and 21,V the bendingV operation is finished. The oper-l ator then swings back lever 29 and the angle bar is movedY a shortdistance further inward between the dies. The bending operation is then repeated. The bar is, of course, bent lon the curve delined lbythe curved surface 20a and 21a. yllhe member 19 and sur face'196 extend some distance beyond the curved` portion of thedies as the angle bar has a tendency to benddownward and must be supported in a horizontal position. The bar isthus keptin the plane of surface 196. As the lever 29 is swung, the roller 27 moves along the surface 19a and the leverage on the member 19, of course, changes.V The-leverage Vcan be varied by varying the degree of incline on surface-19a.

From the above description it will be seen that applicant has provided Ya simple and eflicient device for bending anfangle bar with one flange substantially perpendicular to the axis of bend, and bent on aconvexcurve. In makingsuch a bend, it will-bek seen thatY the side flange must be stretched at itsnconvex edge. In' the actual operation, the flange is also compressed or stove somewhat at the portion adjacent the other-flange.` It has beenffound in practiceV that there is assuma Vthe bending operation. The device bends the bar with great accuracy and the form of the bar is racticall erfect after beine' 2D Y bent. VThe bend can,'of course, be made as extensive as desired, by successively moving the bar after each operation of the dies. The device has been amply demonstrated in actual practice and found to be very successful and efficient.

It will, of course, be understood that vari- `ous changes may be made in the form, de-

tails, arrangement and proportions of the parts, without departing from the scope of applican s invention, which generally stated, consists in a device capable of carrying out the objects Vabove set forth, in the parts yand combinations of parts disclosed and defined in the appended claims.

`What is lclaimed is l. A device for bending angle irons having in combination, relatively movable die menibers having respectively convex and concave surfaces adapted to approach and recede, and having flat surfaces disposed respectively substantially f right angles to said convex and concave surfaces, and means for effectingV relative movement of said dies to cause said convex and concave surfaces to approach, and means actuated by said movement for causing said flat surfaces to approach. c

2. Adevice for bending angle irons having in combination, a ymember having a curved concave surface, a member having a curved convex surface, means having a fiat surface extending at one side beyond said curved surfaces adapted to support one flange of an angle bar, the other flange of which is engaged between said curved surfaces, and a means having a flat surface disposed parallel to said flat surface movable against said first mentioned ange by approaching movement of saidV concave and convex surfaces.

3. A die for bendingangle irons having in combination, a die member having a convex surface, means having a flat surface extending at right angles to said surface, a second member having a flat surface disposed parallel to said fiat surface, and a third member having a concave surface parallel to said convex surface, and a common means for moving said third member towards said first member to bring said concave and convex surfaces against the work, and to cause relative movement between said fiat. surfaces to# bring them together..

4t., A die for: bending angle irons having',- incombinatifoma member, having spaced pon tions projecting therefrom having inclined outer surfaces, ay die member having slots receiving said portions having inclined sur-- facesengaging said inclined surfaces,said' die member having aA concave front surface and. a fiat lower surface, means having a. flat,

surfaceqspaced from saidflat surface, means for ressineiworka ainstsaid concavey sur-1 l) e face to causesaid dietomove its fla-t surface towards said second mentioned flat surface.,

5.,.A die for bending angle ironshaving in combination, aV die having a concave surface, means having a fiat surface:r adjacent and substantially, at right anglesto `said concave surface, said diehaving4 a movable portion having av surface substantially parallel to said flat surface, said die and movable portion having;y cooperating ycame surfaces, whereby when pressureV isv exerted against saidv concavev surface, said portion is moved to cause said ii'at surface and third` mentioned surfaces to approach, and a die movable towards said concave surface to press a flange of an angle bar against the same. f

6. A die for bending angle irons having in combination, a die having a curved surface, means having a flat surface adjacent one side of said die, said die having a movable portion having a flat surface substantially parallel to said first mentioned flat surface, wedge means causing movement of said portion for moving said'flat surfaces toward each other, and a die having a surface movable toward said concave surface.

7. A die for bending angle irons having in combination, dies having convex and concave surfaces respectively for engaging opposite sides of the flange of an angle bar therebetween, means having a fiat surface supporting one side of the other flange of said bar, one of said dies having means with a flat surface for engaging the opposite side of said other flange, and wedge'means causing said last mentioned means to move and its flat surface to engage said angle bar.

8. A die for bending angle irons having in combination, a die having a convex sur-v face, a die having a concave surface adapted to pressa flange of an angle bar against said convex surface, one of said dies being pivoted adjacent one end for movement toward the other die to cause said surface to approach, said pivoted die having an inclined surface thereon, a lever movable about a fixed pivot, and a roller carried by said lever engaging said inclined surface to move said pivoted die toward the other die.

9. A die for bending angle irons having in combination, a die having a concave sur face with rectilinear elements and having a Hat Surf-ace? extending' substantially at right angles to said rectilinear elements of said concave surface, said flat surface extendx ing yquite -a distance beyond said concave 1 surface and arranged to support one flange ofthe angle bar, said die having means with a flat surface movable toward said first mentioned flat surface to engage said' iange of I said angle bar, another die having a convex c i surface adapted to oppose said concave surface, and means for moving said dies t'ogether for bending an angle bar.

' l0. A device for bending angle irons so A that one flange is bent about an axissubl stantially perpendicular to the plane thereprising means having a convex ',surface, means for gripping one flange of an angle bar between flat surfaces, and means havnfl' ing a concave surface movable toward said convex surface for bending said rst ymentioned flange about the curve of said convex surface, and compressing the other flange between said concave and convex surfaces.

' ALBERT HOSSFELD.

of, With'its edge on a convexcurve, com- 

